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Math Help - Find the mean

  1. #1
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    Post Find the mean

    Find the geomatric mean between 2 and 8. Please explain how to solve this. Thanks.
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by IHATECHONGAS View Post
    Find the geomatric mean between 2 and 8. Please explain how to solve this. Thanks.
    the geometric mean of n terms, is the n-th root of the products of all the temrs

    for example:

    what is the geometric mean of 1,2,3,4,5

    there are 5 terms, so the geometric mean is given by

    fifthroot(1*2*3*4*5) = fifthroot(120) or 120^(1/5)

    now try your question and tell me the answer
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  3. #3
    Junior Member whytechocolate01's Avatar
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    Well this is what I got...

    2*8 = 16

    Sqr. Rt. 16 = 4

    4 is the geometric mean...

    correct?
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  4. #4
    Bar0n janvdl's Avatar
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    I'd say 4,55...
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by whytechocolate01 View Post
    Well this is what I got...

    2*8 = 16

    Sqr. Rt. 16 = 4

    4 is the geometric mean...

    correct?
    correct
    Last edited by Jhevon; May 7th 2007 at 05:45 PM.
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  6. #6
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by janvdl View Post
    I'd say 4,55...
    why do you say that?
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  7. #7
    Bar0n janvdl's Avatar
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    Shouldn't it be 7root of (2 x 3 x 4 x 5 x 6 x 7 x 8)?

    That means:
    7th root of (40320)
    = 4,549
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  8. #8
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    Wow..I had this exact question in a worksheet. IHATECHONGAS i'm wondering if you're in my class...lol
    Last edited by pow3r2dapplz; May 8th 2007 at 05:17 AM. Reason: name wrong
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  9. #9
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by janvdl View Post
    Shouldn't it be 7root of (2 x 3 x 4 x 5 x 6 x 7 x 8)?

    That means:
    7th root of (40320)
    = 4,549
    well, in that case yeah. but the question never said all numbers between 2 and 8 it just said 2 and 8. that's proably what they meant though, since doing it for just two numbers is kind of trivial
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  10. #10
    Bar0n janvdl's Avatar
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    Quote Originally Posted by Jhevon View Post
    well, in that case yeah. but the question never said all numbers between 2 and 8 it just said 2 and 8. that's proably what they meant though, since doing it for just two numbers is kind of trivial
    Oh ok. Thanks for explaining Jhevon.
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